<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="../../react18/react.development.js"></script>
    <script src="../../react18/react-dom.development.js"></script>
    <script src="../../react18/babel.min.js"></script>
</head>

<body>
    <div id="app"></div>
    <script type="text/babel">
        class App extends React.Component {
            state={
                count:0,
                isHot:true
            }
            render() { 
                const {count,isHot}=this.state
                return (
                    <div>
                        <button onClick={this.handle}>+</button>
                        <p>{count}</p>
                        <p>{isHot?'热啊':'冷啊'}</p>
                    </div>
                )
            }
            handle=()=>{
                let {count,isHot}=this.state
                console.log(this);
                this.setState({
                    isHot:!isHot,
                    count:++count
                })
            }
        }
        const root = ReactDOM.createRoot(document.getElementById('app'))
        root.render(<App />)


    </script>
</body>

</html>